Experimental Study on Influences of Metal Particle on High-Altitude Discharge Characteristics

doi:10.16628/j.cnki.2095-8188.2020.02.004

Abstract

Abstract: With the trends of high-voltage,high-capacity and miniaturization in aircraft power system,the working voltage of the power system is higher,and the arrangement of each component is denser,which increases the probability of partial discharges of the aircraft power equipment greatly.In order to analyze the influence of aircraft complex working environment on air gap breakdown characteristics,the characteristics of air gap breakdown under conditions of low-pressure,micro-distance,and metal particle were studied experimentally.Aluminum foils are used to simulate the metal particles in aircraft power system.Discharge experiments with different pressure and gap distances were carried out.The motion of metal particles was recorded by a high-speed camera.The dependence of air gap breakdown voltage on pressure,gap distance and metal particles was analyzed and discussed.The results show that there is a certain critical pressure value,and metal particles have no effect on air gap breakdown characteristics when the pressure is lower than this value.When the pressure is greater than this value,the breakdown voltage of the air is stabilized at a small value due to the motion of the metal particles.

Key words: aircraft power system, low pressure, metal particle, breakdown voltage, paschen curve

CLC Number:

TM21

WANG Kunlin, DENG Yunkun, TIAN Zengyao, ZHAO Hu, WANG Ke, PENG Jing, MA Yi. Experimental Study on Influences of Metal Particle on High-Altitude Discharge Characteristics[J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 587(2): 20-24.

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